Lighting apparatus

ABSTRACT

The present invention relates to a lighting apparatus using LEDs as light sources and a display using the lighting apparatus, particularly, the present invention provides a lighting apparatus including: a plurality of light sources located on a printed circuit board; and a reflecting unit provided on the printed circuit board; and a spaced area provided inside the reflective unit.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.15/965,211, filed Apr. 27, 2018; which is a continuation of U.S.application Ser. No. 15/056,068, filed Feb. 29, 2016, now U.S. Pat. No.9,982,849, issued May 29, 2018; which is a continuation of U.S.application Ser. No. 14/110,084, filed Oct. 4, 2013, now U.S. Pat. No.9,279,546, issued Mar. 8, 2016; which is the U.S. National Stageapplication of International Patent Application No. PCT/KR2012/002532,filed Apr. 4, 2012; which claims the benefit under 35 U.S.C. § 119 ofKorean Patent Application Nos. 10-2011-0030697, filed Apr. 4, 2011;10-2011-0070270, filed Jul. 15, 2011; 10-2012-0017280, filed Feb. 21,2012; and 10-2012-0017282, filed Feb. 21, 2012, the disclosures of eachof which are incorporated herein by reference in their entirety.

FIELD OF THE INVENTION

Embodiments of the present invention relate to a lighting apparatususing an LED as a light source, and more particular, to a lightingapparatus having a thin structure that can be applied to interiorillumination, lamps for vehicles, backlighting apparatus, and liquidcrystal displays.

BACKGROUND ART

A device that performs illumination by guiding light emitted from alight source are required in various ways for lighting lamps, lamps forvehicles, and liquid crystal displays. A technology of making thestructure of equipment thin, and a structure that can increase lightefficiency are considered as the most important technologies in lightingapparatus.

A liquid crystal display equipped with the lighting apparatus isexemplified and described as follows.

Referring to FIG. 1, in a lighting apparatus 1, a flat light guide plate30 is disposed on a substrate 20 and a plurality of side type LEDs 10(only one shown) is arrayed on the sides of the light guide plate 30.

Light L entering the light guide plate 30 from the LEDs 10 is reflectedupward from a fine reflection pattern or a reflective sheet 40 under thelight guide plate 30 and travels out through the light guide plate 30,such that an LCD panel 50 above the light guide plate is provided withlight.

In the structure of the lighting apparatus, as shown in the conceptualview of FIG. 2, a plurality of optical sheets, such as a diffusion sheet31 or prism sheets 32, 33, or a protective sheet 34, may be furtherdisposed between the light guide plate 30 and the LCD panel 50.

Accordingly, since the light guide plate is basically used as anecessary component in the lighting apparatus, there is a limit inreducing the entire thickness of a product due to the thickness of thelight guide plate, and the image quality decreases in a lightingapparatus with a large area.

DETAILED DESCRIPTION OF THE INVENTION Technical Problem

An embodiment of the present invention is to provide a lightingapparatus that makes it possible to improve the reflectivity andluminance as much as possible and to increase the luminance withoutincreasing the thickness of the lighting apparatus or the number oflight sources by being equipped with a reflecting unit having an spacedarea on the surface of a printed circuit board, and to increaseadjustment of light and a reflective efficiency as large as possible byusing a pattern design of a spacer that defines the spaced area.

Another embodiment of the present invention is to provide a reliableproduct that makes it possible to reduce the number of light sources,decrease the entire thickness of a lighting apparatus, and make thedesign of the product freer, by removing a light guide plate that is anecessary component in the structure of a common lighting apparatus andimplementing a structure that guides light sources by using a film typeof resin layer.

Technical Solution

In accordance with an embodiment of the present invention, a lightingapparatus includes: a plurality of LEDs mounted on a printed circuitboard; and a reflecting unit stacked on the printed circuit board, withthe LEDs through the reflecting unit, in which the reflective unitincludes a reflective member containing metal attached to the surface ofthe printed circuit board or a first reflective member made of white PET(white polyethylen terephthalate); and a transparent second reflectivemember spaced from the first reflective member and defining the spacedarea.

Therefore, it is possible to increase luminance without increasing thethickness of the lighting apparatus or the number of light sources whilemaximizing improvement of reflectivity and luminance of light by formingthe reflecting unit having the spaced area and made of the metalreflective materials and the white PET (white polyethylen terephthalate)on the surface of the printed circuit board, and to maximize theadjustment and reflective efficiency of light by using the patterndesign of the spaced member (spacer).

Advantageous Effects

In accordance with the present invention, it is possible to maximizeimprovement of reflectivity and luminance of light by using a metalreflective unit or white PET(white polyethylen terephthalate) for areflecting unit having an spaced area on the surface of a printedcircuit board, to increase luminance without increasing the thickness ofthe lighting apparatus or the number of light sources, and to adjustlight and maximize the reflective efficiency by using the pattern designof the spaced member (spacer) defining the spaced area.

Further, it is possible to inhibit hot spot and warm portion generatedat a light shield pattern portion by defining a spaced area by formingan optical pattern layer having an optical pattern and patterning abonding material, to implement a lighting apparatus without a differencein optical properties and ensuring reliability between the bondingmaterial and the bonded components, and to accurately align thecomponents.

Further, it is possible to increase diffusion and uniformity of light inthe optical properties of the lighting apparatus by disposing aspacedmodule having a spaced layer patterned on the diffusion member or formedby a specific member.

Further, it is possible to reduce the number of light sources, decreasethe entire thickness of the lighting apparatus, and make the design ofthe product freedom, by removing a light guide plate that is necessaryin a common lighting apparatus and guiding light sources with a filmtype of resin layer.

In particular, it is possible to ensure optical properties while greatlyreducing the number of light sources by mounting side type of lightemitting diode in a vertical type, apply the lighting apparatus to aflexible display by removing a light guide plate, and ensure a stableemission property by disposing a reflective member including areflective pattern and a diffusion member including a spaced layer on aresin layer.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1 and 2 are conceptual views showing the structure of a lightingapparatus of the related art.

FIG. 3 is a conceptual cross-sectional view showing the main parts of alighting apparatus according to the present invention.

FIG. 4 is a view showing an example of a spaced member of a reflectingunit included in the lighting apparatus of the present invention shownin FIG. 3.

FIG. 5 is a conceptual view showing an example of a reflecting unitaccording to the present invention.

FIG. 6 is a table showing the result of comparing efficiencies ofreflecting unit according to the present invention.

FIG. 7 is a view showing another embodiment of a lighting apparatusaccording to the present invention.

FIG. 8 is a view showing another embodiment of a lighting apparatusaccording to the present invention.

FIGS. 9 and 10 are views showing various examples of an optical patternlayer and a diffusion member according to the present invention.

DESCRIPTION OF SPECIFIC EMBODIMENTS

Configuration and operation according to the present invention aredescribed hereafter in detail with reference to the accompanyingdrawings. In the following description referring to the accompanyingdrawings, the same components are given the same reference numerals inthe figures and the description is not provided. The terms, ‘first’ and‘second’ etc., can be used to describe various components, but thecomponents are not limited to the terms. Terms described in thespecification is used to discriminate one component from othercomponents.

The present invention has been designed to improve reflectivity andluminance by disposing a reflecting unit having a spaced area under anLED in a lighting apparatus using the LED as a light source. Inparticular, in the structure of a lighting apparatus of the related art,the present invention provides a structure that makes it possible toimprove optical properties by an optical pattern layer for implementinga spaced area by patterning a bonding material (bonding pattern layer)or a spaced module having a spaced layer by patterning a diffusionmember or using a specific member, and particularly, to greatly reducethe entire thickness of the lighting apparatus by removing a light guideplate and forming a resin layer instead of the light guide plate and toreduce the number of light sources.

Further, the lighting apparatus according to the present invention isnot limited to a backlighting apparatus of the liquid crystal displaydescribed above. That is, the present invention can be obviously appliedto various lamps that require lighting, such as lamps for vehicles, homelighting devices, and industrial lighting devices. The lamps forvehicles are obviously the headlight, interior and exterior lamps, andrear light.

1.1. First Embodiment

FIG. 3 is a conceptual cross-sectional view showing the main parts of alighting apparatus according to the present invention.

Referring to FIG. 3, a lighting apparatus according to the presentinvention includes a plurality of LEDs 130 disposed on a printed circuitboard 110 and a reflecting unit 120 stacked on the printed circuit board110, with the LEDs 130 through it, on the printed circuit board 110. Inparticular, a spaced area A1 is defined inside the reflecting unit 120in this configuration. The spaced area A1 can maximize luminance byincreasing the reflective efficiency of light out of the light sources130.

In particular, the reflecting unit 120 may include a first reflectivemember 121 attached to the surface of the printed circuit board 110 anda second reflective member 122 made of a transparent material forforming the spaced area A1 and spaced apart from the first reflectivemember 121. The first and second reflective members 121 and 122 arestacked on the printed circuit board and the LEDs 130 protrude outwardthrough holes formed through the reflective members.

The spaced area A1 makes it possible to form the first and secondreflective members 121 and 122 in an integral pressed structure withoutusing a specific adhesive, and as shown in the figure, the first andsecond reflective members 121 and 122 may be spaced apart from eachother to define the spaced area A1 filled with air, by a spaced member123 such as a specific bonding member.

In this structure, the first reflective member 121 may be a film with areflective material that reflects light, such as a metal layer made ofAg and the second reflective member 122 is preferably a film made of atransparent material such that the light from the LEDs travels andreflects again from the surface of the first reflective member 122. Inparticular, the first reflective member 121 is a reflective structurethat reflects light, and particularly, the first reflective member 121is preferably made of white PET (white polyethylen terephthalate) in thepresent invention. That is, the first reflective member may beimplemented by a common metal reflective material layer (Ag etc.) in thespecific reflective unit according to the present invention, but whitePET (white polyethylen terephthalate) may be used to maximally improvethe luminance. It is possible to improve the luminance by about 30% incomparison to the related art, when the first reflective member is madeof white PET (white polyethylen terephthalate) to implement thereflecting unit.

In particular, it is further preferable to provide a reflective pattern124 by printing white on the surface of the second reflective member 122such that the luminance can be improved by further diffusing light, inaddition to allowing the light emitted from the light sources 130 toreflect again from the second reflective member after passing throughthe first reflective member. A reflective pattern 130 is provided togreatly improve reflectivity of light and may be printed with reflectiveink containing any one of TiO₂, CaCO₃, BaSO₄, Al₂O₃, Silicon, and PS.

In particular, various light sources may be used for the light sourcesof the lighting apparatus according to the present invention, andpreferably, side emission type of LEDs may be used, in which thereflective pattern is preferable formed in the emission direction of theLEDs and particularly, it may be disposed such that the pattern densityincreases with the increase in distance from the LEDs in the emissiondirection. Using the side emission type of LEDs makes it possible toconsiderably reduce the number of light sources.

FIG. 4 is a view showing an example of a spaced member of a reflectingunit included in the lighting apparatus of the present invention shownin FIG. 3.

That is, the spaced member according to the present invention may be acommon member that defines an spaced area by spacing the firstreflective member and the second reflective member, such as a spacerthat simply spacing them or an adhesive spacer, but preferably, thespaced member may be formed by uniformly or randomly patterning astructure patterned in the structure shown in FIG. 4 in order toincrease a bonding efficiency and efficiently arranging the spaced area.

The spaced member 123 shown in FIG. 4 has hollow unit spaced members 123a and may be implemented in a two- or three-dimensional structure withfirst spaced portions 123 b by the hollow structure of the unit spacedmembers 123 a. That is, the unit spaced member 123 a may have variouscross-sections such as a polygon, a circle, and an ellipse. The unitspaced members 123 are arranged in contact with each other in thefigures, but may be non-uniformly arranged such that second spacedportions 123 c which are empty are formed between the unit spacedmembers 123 a, with the first spaced portions 123 b of the unit spacedmembers 123 a formed.

FIG. 5 is a view showing a detailed example of the reflecting unitdescribed in detail with reference to FIGS. 3 and 4. The reflecting unit120 according to the present invention, as described above, includes thefirst reflective member attached to the surface of the printed circuitboard and the second reflective member 122 spaced from and opposite thefirst reflective member. In particular, a film made of a transparentmaterial such as PET, or the like, may be used as the second reflectivemember 122 and the spaced member 123 spacing the first and secondreflective members 121 and 122 is formed by patterning a bondingmaterial, thereby defining the spaced area.

In particular, in order to maximize the reflectivity the firstreflective member 121 has an optical film 126 bonded by a metalreflective layer 125 that is adhesives (primer) T₁ and T₂, in which theoptical film 126 may also be stacked on a release film 128 through abonding material (PSA) 127.

In the structure shown in FIG. 5, unlike the embodiment of the firstreflective member, the first reflective member 121 may be formed byusing white PET (white polyethylen terephthalate) in a reflectivestructure that reflects light.

FIG. 6 is a table for comparing the degrees of improvement of luminancein a lighting apparatus when the reflecting unit according to thepresent invention is implemented (CIE X and CIE Y are colorcoordinates).

(A) in the table shows luminance measured when only one reflectivemember made of Ag was formed on the printed circuit board in thestructure of FIG. 3, (B) shows the resultant value of improvement ofluminance, comparing the structure A of the related with the structureof the reflecting unit according to the present invention, that is, whenthe bonding pattern material was silicon, the pattern of FIG. 4 wasformed, and the first reflective member was made of Ag.

Further, (C) shows the resultant value of improvement of luminancecompared with the structure of (A) of the related art, when the firstreflective member was made of white PET (white polyethylenterephthalate), unlike (B).

According to the measured result, when luminance was 6605 nit in (A),luminance was 7468 nit, about 13% improved in the structure of (B), andfor (C) in which the reflecting unit contained white PET (whitepolyethylen terephthalate) according to the present invention, luminancewas 8472 nit, increased by 28.6% in comparison to (A). That is, it ispossible to achieve a result of maximizing the luminance when thestructure (spaced area) formed by patterning a bonding material layer isformed and white PET (white polyethylen terephthalate) is used.

2.2. Second Embodiment

FIG. 7 is a view showing another embodiment of a lighting apparatusaccording to the present invention.

That is, the second embodiment according to the present inventionimplements a structure in which a resin layer is stacked on the printedcircuit board of the first embodiment. The configuration of the resinlayer corresponds to replacing a light guide plate that is used in alight device of a liquid crystal display and performs a function ofguiding light emitted from a light source forward.

Referring to FIG. 7, a lighting apparatus according to the presentinvention further includes a plurality of LEDs 130 formed on a printedcircuit board 110 and a resin layer 140 that diffuses and guides emittedlight toward the front.

That is, the resin layer 140 is stacked to surround the LEDs 130 andperforms a function of diffusing light emitted to sides from the lightsources. That is, the function of a light guide plate of the related artcan be performed by the resin layer 140.

Obviously, the resin layer may be basically made of any material as longas the material can diffuse light. For example, according to anembodiment of the present invention, the main material of the resinlayer may be resin of which the main material is urethane acrylateoligomer. For example, a substance made by mixing urethane acrylateoligomer that is composite oligomer with a polymer type that ispolyacryl. Obviously, a monomer mixed with IBOA (isobornyl acrylate),HPA (Hydroxylpropyl acrylate, or 2-HEA (2-hydroxyethyl acrylate), whichis dilutable reactive monomer and a photoinitiator (for example,1-hydroxycyclohexyl phenyl-ketone) or an antioxidant may be mixed, asand additive.

Further, the resin layer 140 may include a light diffuser 141 toincrease diffusion and reflection of light. It is preferable to containsthe light diffuser of 0.01˜0.3 wt % of the entire weight of the resinlayer. That is, the light emitted to sides from the LED can be diffusedand reflected through the resin layer 140 and the light diffuser 141 andtravel upward.

Therefore, it is possible to further increase the reflection togetherwith the reflecting unit 120 according to the present invention.Accordingly, as the resin layer is disposed, it is possible to reducethe entire thickness of the product by greatly decreasing the thicknessof the light guide plate of the related art and to provide commonusability for flexible displays because ductility is provided.

3.3. Third Embodiment

The structure of a lighting apparatus according to the third embodimentin which an optical pattern layer that promotes light diffusion isformed on the resin layer is described as a structure improved from thestructure of the second embodiment.

That is, referring to FIG. 8, a lighting apparatus according to thepresent invention can be implemented in a structure including an opticalpattern layer 150 disposed on the resin layer 140 and having an opticalpattern 151 in the structure shown in FIG. 7.

In particular, the optical pattern layer 150 may include a bondingpattern layer 150 defining a second air region 152 surrounding theoptical pattern. That is, the bonding pattern layer 153 defines aseparate space (second spaced area) having a uniform pattern on theoptical pattern 151 and an adhesive is applied to the other portions forbonding.

That is, in the structure shown in the figure, for the arrangementrelationship of the optical pattern layer 150 and the bonding patternlayer 153, the optical pattern layer 150 includes a first substrate 150Aand a second substrate 150B which include the optical pattern insidethem while the bonding pattern layer 153 is applied to the portionsother than the second spaced area 152 surrounding the light shieldpattern, such that the first substrate 150A and the second substrate150B are bonded.

That is, the optical pattern 151 may be implemented by a light shieldpattern formed to inhibit concentration of light emitted from the LED130, and for this configuration, it is necessary to align the opticalpattern 151 with the LEDs 130, and an adhesive is applied to ensure afixing force.

The first substrate 150A and the second substrate 150 B may be made of amaterial having good light transmissivity, for example PET. In thiscase, the optical pattern 151 disposed between the first substrate 150Aand the second substrate 150B basically has a function of inhibitingconcentration of light emitted from the LEDs, may be implemented bylight shield printing on any one of the first substrate 150A or thesecond substrate 150B, and the substrates can be bonded and aligned byapplying an adhesive to surround the light shield pattern. That is, thestructure that bonds the first substrate 150A and the second substrate150B makes it possible to achieve a function of fixing the printed lightshield pattern 151. Further, the bonding layer may be made of, forexample, thermoset PSA, a thermoset adhesive, or a UV-curable PSA typematerial.

When the bonding pattern layer 153 is formed and bonded in a patternstructure for forming the second spaced area 152, strong hot spot or armportion generated when the bonding material overlaps the light shieldpattern can be inhibited, and uniformity of light can be increased by aspaced layer.

The lighting apparatus having the structure described above, accordingto the present invention, may include a diffusion member 170 on theresin layer 140, in addition to the configuration described above, andmay further include anspaced module 160 having a third spaced area 161between the diffusion member 170 and the optical pattern layer 150.Further, a prism sheet and a protective sheet may be additionallydisposed on the diffusion member.

FIG. 9 is a conceptual view showing the configuration of the opticalpattern 151 and the bonding pattern layer 153, and the second spacedarea 152 defined by them.

When the bonding pattern layer 153 is formed in a structure surroundingthe optical pattern 151 printed in a specific pattern on the firstsubstrate by a bonding material, a predetermined separate space isformed and the second substrate 150B is bonded, such that the separatedspace is closed with a spaced layer, which is defined as the secondspaced area. The plane shape of the first spaced area 152 formed by thebonding pattern layer 153 may be implemented in various shapes, such asa circle, an ellipse, a rectangle, a square, and a polygon. Further, thebonding pattern layer may be made of, for example, thermoset PSA, athermoset adhesive, or a UV-curable PSA type material.

Further, the optical pattern 151 is preferably formed in a light shieldpattern to achieve a partial light shield effect in order to inhibitdeterioration of optical properties or yellowish of yellow light due toexcessive intensity of light. That is, it is possible to print a lightshield pattern by using light shield ink such that light is notconcentrated.

The optical pattern may be implemented to adjust the degree of blockinglight or the degree of diffusion of light in one optical pattern, inorder not to completely block light, but partially block and diffuselight. Further, more preferably, the optical pattern according to thepresent invention may be implemented in an overlap printing structure ofa composite pattern. The overlap printing structure is a structureimplemented by forming one pattern and printing another pattern shapethereon.

For example, the optical pattern 151 may be implemented in an overlapprinting structure of a diffusion pattern formed by light shield inkcontaining any one or more selected from TiO₂, CaCO₃, BaSO₄, Al₂O₃, andSilicon on the underside of a macromolecular film in the emissiondirection of light and a light shied pattern using light shield inkcontaining Al or a mixture of Al and TiO₂. That is, a double structuremay be possible to form a diffusion pattern on the surface of amacromolecular film by white printing and then forming a light shieldpattern thereon, or in the opposite order. Obviously, the design of thepattern may be changed in various ways in consideration of theefficiency and intensity of light, and the light shield rate.Alternatively, a triple structure may be possible by forming a lightshield pattern, which is a metal pattern at the middle layer in asequentially stacked structure, and forming a diffusion pattern on andunder the light shield pattern. It is possible to implement the triplestructure by selecting the materials, and a preferred example is toimplement one of diffusion patterns by using TiO₂ having high a highrefractive index and implement the other diffusion pattern by usingCaCO₃ and TiO₂ which has high optical stability and tone, such that itis possible to ensure efficiency and uniformity of light by using thetriple structure that implements a light shield pattern by using A1 thatis easily covered. In particular, CaCO₃ finally implements white lightby reducing exposure of yellow light such that more stable light havinghigh efficiency can be implemented, and inorganic materials having asimilar structure, in which the particle size is large, such as BaSO₄,Al₂O₃, and Silicon light diffusers, may be used, other than CaCO₃.Further, it is preferable to form the optical pattern by adjustingpattern density such that pattern density decreases as it becomes farfrom the LED in the emission direction in terms of light efficiency.

Further, the inhibit invention may further include anspaced moduledisposed between the optical pattern layer 150 and the diffusion member170.

FIG. 10 is a view showing an example of forming thespaced moduledisposed between the optical pattern layer 150 and the diffusion member170 shown in FIG. 8.

That is, according to the configuration of the lighting apparatusaccording to the present invention, it is possible to add a structurehaving a spaced layer (third spaced area 160) between the opticalpattern layer 150 and the diffusion member 170 and to achieve an effectthat diffuses light emitted from the light source and improve uniformityof the light by using the third spaced area 160. Further, it ispreferable to make the third spaced area 160 0.01˜2 mm thick in order tominimize a difference of the light passing through the resin layer 140and the optical pattern layer 150.

The third spaced area 160 may be formed by a structure in which a spacedlayer can be formed under the diffusion member and it is determined asan “air gap module”, including the third spaced area implemented by thestructure.

Thespaced module includes both a method of implementing a spaced area(spaced layer) by machining the diffusion member and a configuration offorming a spaced area by forming a specific structure under thediffusion member.

That is, as shown in FIG. 10A, the third spaced area 160 may beimplemented by forming a spacer 171 under the diffusion member 170, oras shown in FIG. 10B, the third spaced area 160 may be implemented inthe structure of a bridge 172 by patterning the lower portion of thediffusion member and attaching it to the lower layer.

The integral structure may be modified in various ways in accordancewith the patterned shape, that is, the pattern of forming the spacedarea, and accordingly the shape of the bridge may be modified in variousways, which is also included in the spirit of the present invention.Further, as in the structure shown in FIG. 10C, it may be implemented ina structure of forming the spaced area 160 by using a specificstructure, other than the method of patterning the underside of thediffusion member. Obviously, the structure is a structure of forming thebridge 174 with a spacer member and the spirit of the present inventionincludes this method, such that various modified examples that canimplement a spaced layer under the diffusion member also correspond tothe spirit of the present invention.

As shown in FIG. 10D, similar to the configuration of FIG. 10B thatpatterns the diffusion member or the configuration of FIG. 10C that usesa specific structure, it may be possible to form the spaced areas 160and 161 in a plurality of layers by using the structures 175 and 176that can implement independent spaced layers.

The lighting apparatus according to the present invention can be appliedto an LCD by the following configuration and operation. In the lightingapparatus according to the present invention, the LEDs 130 may be sideemission type of LEDs.

Referring to FIG. 8, light is emitted to sides from the side emissiontype of LED 130, the emitted light is reflected and diffused by theresin layer 140 formed instead of a light guide plate of the relatedart, the light is inhibited from being concentrated by the opticalpattern layer 150, and a difference o flight can be minimized by thethird spaced area formed under the diffusion member. In particular, thereflectivity can be further improved by the reflecting unit 120according to the present invention which is disposed between the resinlayer 140 and the printed circuit board 110, such that efficiency oflight can be maximized and luminance can be improved. In particular, inthe reflecting unit 120 according to the present unit, it is possible toadjust the reflectivity by varying the design for implementing thespaced areas by patterning the bonding material layer while it ispossible to implement different reflectivity and colors in accordancewith the type. Further, it is possible to adjust the reflectivity inaccordance with the optical property and thickness of the secondreflective member 122.

Consequently, the reflective efficiency of the light from the reflectingunit 120 and the reflective pattern 124 according to the presentinvention increases, such that it is possible to guide the lightforward. The light passing through the resin layer 140, as describedabove, is diffused or blocked by the optical pattern 151 formed on theoptical pattern layer 150 and the optical property of the refined lightis refined again through thespaced module formed under the diffusionmember, such that the uniformity can be increased, and the light travelsinto the LCD panel in white light through the optical sheets, such asthe additional prism sheet 180 and the DBEF 190.

As described above, it is possible to maximize the reflective efficiencyby the structure having the spaced areas of the reflecting unit in thelighting apparatus according to the present invention, and to reduce thethickness and the number of light sources by removing the structure f alight guide plate, applying side emission type of LEDs for the lightsources, and guiding light to be diffused and reflected by the resinlayer. Meanwhile, it is possible to improve optical properties by makingit possible to control reduction of luminance and uniformity due to thedecrease of the light sources by using the reflective pattern, the lightshield pattern, and the spaced areas of thespaced module.

The detailed embodiments of the present invention were described above.However, it is possible to modify the present invention in various wayswithout departing from the scope of the present invention. The scope ofthe present invention should not be construed as being limited to theembodiments described above, but determined by equivalents to claims, inaddition to claims.

INDUSTRIALLY AVAILABILTY

The present invention according to the present invention can be appliedto various lamps that require lighting, such as lamps for vehicles, homelighting devices, and industrial lighting devices. The lamps forvehicles are obviously the headlight, interior and exterior lamps, andrear light.

What is claimed is:
 1. A lighting apparatus comprising: a board; aplurality of light sources disposed on the board; a reflecting unitdisposed on the board; and a resin layer disposed on the plurality oflight sources, wherein the reflecting unit comprises a reflecting filmdisposed on the board, a transparent film disposed to be spaced apartfrom the reflecting film, and a spaced member disposed between thereflecting film and the transparent film, and the reflecting unitcomprises a plurality of holes through which the plurality of lightsources pass.
 2. The lighting apparatus of claim 1, wherein lightemitted from the plurality of light sources passes through thetransparent film and is reflected from the reflecting film.
 3. Thelighting apparatus of claim 1, comprising a plurality of reflectingpatterns disposed on the transparent film.
 4. The lighting apparatus ofclaim 1, wherein the spaced member comprises a plurality of unit spacedmembers and a plurality of first spaced areas, and the plurality of unitspaced members are disposed to be connected to each other.
 5. Thelighting apparatus of claim 4, wherein each of the plurality of unitspaced members comprises a hexagonal outer circumferential surface inwhich each of the plurality of first spaced areas is disposed.
 6. Thelighting apparatus of claim 1, comprising an optical pattern layerdisposed on the resin layer, wherein the optical pattern layer comprisesa first film, a second film disposed on the first film, and a shieldpattern and a bonding pattern layer that are disposed between the firstfilm and the second film.
 7. The lighting apparatus of claim 6, whereinthe shield pattern comprises an area overlapping each of the pluralityof light sources in a direction perpendicular to the board.
 8. Thelighting apparatus of claim 7, wherein the shield pattern is formed of aplurality of unit patterns that are printed on a lower surface of thesecond film, and the shield pattern comprises an area in which a densityof the plurality of unit patterns is decreased.
 9. The lightingapparatus of claim 7, wherein the bonding pattern layer is disposed tobe spaced apart from the shield pattern due to a second spaced areaformed around the shield pattern.
 10. A lighting apparatus comprising: aboard; a plurality of light sources disposed on the board; a reflectingunit disposed on the board; a resin layer disposed on the plurality oflight sources; and a shield pattern disposed on the resin layer, whereinthe reflecting unit comprises a reflecting film disposed on the boardand a transparent film disposed on the reflecting film, and thereflecting film and the transparent film comprise a plurality of holesthrough which the plurality of light sources pass, respectively.
 11. Thelighting apparatus of claim 10, wherein the reflecting unit comprises aplurality of first spaced areas formed between the reflecting film andthe transparent film.
 12. The lighting apparatus of claim 10, comprisinga plurality of reflecting patterns disposed on the transparent film anddisposed in a direction in which light of each of the plurality of lightsources emits.
 13. The lighting apparatus of claim 10, wherein thereflecting unit comprises a plurality of unit spaced members and aplurality of first spaced areas which are disposed between thereflecting film and the transparent film, and the plurality of firstspaced areas are disposed to be spaced apart from each other due to theplurality of unit spaced members.
 14. The lighting apparatus of claim13, wherein each of the plurality of first spaced areas comprises ahorizontal section having a hexagonal shape.
 15. The lighting apparatusof claim 10, comprising: a first film disposed below the shield pattern;a second film disposed above the shield pattern; and a bonding patternlayer disposed to be coplanar with the shield pattern.
 16. The lightingapparatus of claim 15, wherein the shield pattern is formed of aplurality of unit patterns that are printed on a lower surface of thesecond film, and the shield pattern comprises an area in which a densityof the plurality of unit patterns is decreased.
 17. The lightingapparatus of claim 10, wherein the plurality of light sources are lightsources that emit light in a lateral direction.
 18. A lighting apparatuscomprising: a board; a plurality of light sources disposed on the board;a reflecting unit disposed on the board; a resin layer disposed on theplurality of light sources; and a plurality of a shield patternsdisposed on the resin layer, wherein the reflecting unit comprise aplurality of holes through which the plurality of light sources pass,respectively, and wherein the plurality of light sources are disposed inan array.
 19. The lighting apparatus of claim 18, wherein each of theplurality of the shield patterns are disposed to overlap each of theplurality of light sources, respectively in a direction perpendicular tothe board.
 20. The lighting apparatus of claim 19, wherein each of theplurality of light sources in a first column of the array and each ofthe plurality of light sources in a second column of the array arearranged so as not to overlap in a row direction of the array.